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Latest comment: 6 years ago2 comments2 people in discussion
According to the section Nucleus, 180m 73Ta and 180 73Ta have spin of -9 and +1 respectively. According to the section High spin suppression of decay, the spin changes 8 units when one decays to the others. Can both be correct?
Klausok (talk) 10:32, 27 June 2016 (UTC)Reply
A good question which no one has answered after almost 2 years. Yes, there is an error here. Actually, the magnitudes of all nuclear spins without exception are nonnegative (positive or zero). The spin of 180m 73Ta is sometimes written as 9– (rather than –9) as in the table in the article on isotopes of tantalum, but the minus sign following the 9 refers to the parity of the quantum wave function; it does not imply that the spin is negative. I have not yet found this spin and parity notation properly described anywhere in Wikipedia. For now I will just remove the minus sign in this article for 180m 73Ta , and also for 99m 43Tc . Dirac66 (talk) 15:24, 18 April 2018 (UTC)Reply
Latest comment: 7 years ago4 comments4 people in discussion
An isomeric transition is described as "similar to any gamma emission from any excited nuclear state, but differs in that it involves excited metastable states of nuclei with longer half lives," i.e. nuclear isomers. So it seems to me that isomeric transitions are not special enough to deserve their own page, and the isomeric transition stub should be merged and redirected into nuclear isomer. Some might want to consider isomeric shift in making up their minds, though I am not proposing anything about that article at this time.--Yannick (talk) 17:58, 9 May 2012 (UTC)Reply
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